My Amp is Broken - Not Sure What to Do - Any Recommendations?


I went to turn on my Audio Research SD135 amplifier the other day, but it will not turn on. According to the Audio Research service technician I spoke to, the problem is a broken Thermal Trak module chip. He said that it is a temperature sensing component, and that replacements are no longer being manufactured. He said that it is a known problem, and that Audio Research will give me credit to purchase an Audio Research amplifier from an Audio Research authorized dealer. 

I was wondering if Audio Research makes anything powerful enough to drive Vandersteen 3A Signature speakers (which need between 100 - 200 watts of power)? I am using an Audio Research SP8 Mk II as a pre-amp.

I don't really have much of a budget and am not sure what to do. I would appreciate any advice. Thank you.
distortions
I have read so many stories about Audio Research amps not being repairable or frequent repairs I would never buy one.  
I wonder how much of a  credit for your old amplifier on a new ARC one?  I agree a great tech could replace or bypass the problem chip. That ARC does NOT offer a working solution? bad service. 
I would think it could get very costly to try to bypass/alter the problem. And you could' pay hundreds and still have a non-functional amp. So personally I would never try to find someone who would go at it. Unless they promise in writing they will fix it or no charge (I know of no tech who would make such a promise unless they had already done the job before).Another way might be to buy a used ARC amp, a more recent one.
Certainly AR knows how to do it, but won’t. They prefer to sell another amp over helping a customer enjoy their current AR amp for many more years. I think this is a reflection of the company’s culture and attitude.
McCormack is reputed to match well with Vandy speakers.  Here's an upgraded DNA-1 at a good price that should have plenty of power for your 3As.  Best of luck in whatever you decide. 

https://www.usaudiomart.com/details/649468342-mccormack-dna1-w-smc-silver-mods/